Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/c5637310d63e
Author: Michał Budzyński <michal@virtualdesign.pl>
Desc: Merge pull request #18954 from michalbe/Bug984584

Bug 984584 - Contacts phone numbers highlighted red when missed

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https://hg.mozilla.org/integration/gaia-central/rev/a0908ee5ac2a
Author: Michal Budzynski <michal@virtualdesign.pl>
Desc: [Bug 984584] - Contacts phone numbers highlighted red when missed

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "7bf976de32cf817ed4529ac875755ac6f6895b89", 
+    "revision": "c5637310d63e417301b36ba2eebbaf98e3d973dc", 
     "repo_path": "/integration/gaia-central"
 }